Date: Fri, 27 Apr 2012 13:21:04 +0000 From: Javier - <javier_9185@hotmail.com> To: <rizzo@iet.unipi.it> Cc: freebsd-ipfw@freebsd.org Subject: RE: Dummynet and bursting! Message-ID: <SNT136-W152D11EF4664B93A7936FB96250@phx.gbl> In-Reply-To: <20120427130200.GA17737@onelab2.iet.unipi.it> References: <20120427065523.GA90180@onelab2.iet.unipi.it> <SNT136-W154D1068D52BC93BA4553D96250@phx.gbl>, <20120427130200.GA17737@onelab2.iet.unipi.it>
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I will make more testing and comment. what=B4s the max value for burst? i did not find this in docs... =20 =20 ---------------------------------------- > Date: Fri=2C 27 Apr 2012 15:02:00 +0200 > From: rizzo@iet.unipi.it > To: javier_9185@hotmail.com > CC: freebsd-ipfw@freebsd.org > Subject: Re: Dummynet and bursting! > > On Fri=2C Apr 27=2C 2012 at 12:40:05PM +0000=2C Javier - wrote: > > > > OK=2C but with increased burst to 5mbytes i have same results. > > > > the issue is the bandwidth=2C not the burst. > it is possible that the system has a bottleneck > similar to the 125k you are configuring. > Besides=2C the tcp window or socket buffer might be > small (say 64Kbytes) so you won't be able to > use the burst anyways. > > luigi > > > will try fresh install from freebsd (no pfsense)=2C and the results wil= l be posted later. > > > > > > > > Thanks! > > > > > > > > --------------------------------------------------------------- > > > > Transfer estimates are completely unreliable in general=2C > > you need time for tcp to open the window=2C plus the RTT > > of the connection influences the throughput=2C etc. > > > > You can perhaps make some reasonable test by setting a low > > bandwidth. Burst seems to work fine here (on stable/9)=2C see below > > > > --- no pipes=2C no nothing --- > > > ping localhost > > PING localhost (127.0.0.1): 56 data bytes > > 64 bytes from 127.0.0.1: icmp_seq=3D0 ttl=3D64 time=3D0.079 ms > > 64 bytes from 127.0.0.1: icmp_seq=3D1 ttl=3D64 time=3D0.064 ms > > ^C > > > > --- one 10Kbit/s pipe=2C no burst --- > > > sudo ipfw add 100 pipe 1 proto icmp out > > 00100 pipe 1 ip from any to any proto icmp out > > > sudo ipfw pipe 1 config bw 10Kbit/s burst 0 > > > sudo ipfw pipe show > > 00001: 10.000 Kbit/s 0 ms burst 0 > > q131073 50 sl. 0 flows (1 buckets) sched 65537 weight 0 lmax 0 pri 0 dr= optail > > sched 65537 type FIFO flags 0x0 0 buckets 0 active > > > ping localhost > > PING localhost (127.0.0.1): 56 data bytes > > 64 bytes from 127.0.0.1: icmp_seq=3D0 ttl=3D64 time=3D134.602 ms > > 64 bytes from 127.0.0.1: icmp_seq=3D1 ttl=3D64 time=3D135.011 ms > > 64 bytes from 127.0.0.1: icmp_seq=3D2 ttl=3D64 time=3D135.019 ms > > ^C > > > > --- now increase the burst to 100Kbytes --- > > > sudo ipfw pipe 1 config bw 10Kbit/s burst 100K > > > sudo ipfw pipe show > > 00001: 10.000 Kbit/s 0 ms burst 102400 > > q131073 50 sl. 0 flows (1 buckets) sched 65537 weight 0 lmax 0 pri 0 dr= optail > > sched 65537 type FIFO flags 0x0 0 buckets 0 active > > > ping localhost > > PING localhost (127.0.0.1): 56 data bytes > > 64 bytes from 127.0.0.1: icmp_seq=3D0 ttl=3D64 time=3D0.070 ms > > 64 bytes from 127.0.0.1: icmp_seq=3D1 ttl=3D64 time=3D0.083 ms > > 64 bytes from 127.0.0.1: icmp_seq=3D2 ttl=3D64 time=3D0.066 ms > > ^C > > > > cheers > > luigi > > ---------------------------------------- > > > Date: Fri=2C 27 Apr 2012 13:49:41 +0200 > > > From: rizzo@iet.unipi.it > > > To: javier_9185@hotmail.com > > > CC: freebsd-ipfw@freebsd.org > > > Subject: Re: Dummynet and bursting! > > > > > > On Fri=2C Apr 27=2C 2012 at 10:50:17AM +0000=2C Javier - wrote: > > > > > > > > I want to leave at cable speed n bytes=2C after n bytes apply the q= ueue bw limit... > > > > > > and what are you seeing instead ? Do you have a trace or > > > something that shows that it does not work like this ? > > > > > > cheers > > > luigi > > > > > > > In Linux with htb this is done with cburst parameter... > > > > > > > > > > > > > > > > Regards! > > > > > > > > > > > > > Date: Fri=2C 27 Apr 2012 08:55:23 +0200 > > > > > From: rizzo@iet.unipi.it > > > > > To: javier_9185@hotmail.com > > > > > CC: freebsd-ipfw@freebsd.org > > > > > Subject: Re: Dummynet and bursting! > > > > > > > > > > On Fri=2C Apr 27=2C 2012 at 04:57:20AM +0000=2C Javier - wrote: > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Hello all!=2C i?m researching about bursting with dummynet?s pi= pes. i can?t find the way in order to make the burst paramter work under pi= pe command=3Bpipe config ........ burst 500000 (500Kbytes)->not luck pipe c= onfig ........ burst 500000 queue 500Kbytes ->not luck These parameters see= ms to be ok under pipe show=2C but no effect on real escenario... traffic i= s anyway at same speed defiined by "bw". Any help/comment wll be appreciate= d...specially from Luigi! Is he alive on the list? Regards! _______________= ________________________________ > > > > > > > > > > can you clarify what you are expecting and what you are seeing ? > > > > > > > > > > cheers > > > > > luigi =
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